Lining assembly for carding roller



p 15, 1970 G. ROTSAERT 3,528,137

LINING ASSEMBLY FOR CARDING ROLLER Filed Oct. 21, I968 v I 2Sheets-Sheet 1 United States Patent 3,528,137 LINING ASSEMBLY FORCARDING ROLLER Georges Rotsaert, 40 Rue de Beaucourt 59, Roubaix, FranceFiled Oct. 21, 1968, Ser. No. 769,162 Claims priority, applicationFrance, Nov. 24, 1967,

rm. or. plu 15/84 US. Cl. 19-114 8 Claims ABSTRACT OF THE DISCLOSURE Theunknotting and the straightening of fibres of natural or artificialtextile material call upon carding machines which separate the fibresone from the other, straighten them, make them parallel, clean them andeliminate the unevennesses and the knots.

In some carding machines there can be distinguished a cylinder or drumon the one hand and on the other hand the caps of the cards disposed onchain conveyors which make them follow along a path of their trajectorya curve concentric to the cylinder.

At the present time the linings assume the shape of laminated steelwires forming a heel seat and a blade in which are cut teeth.

In rigid linings can be distinguished three three principal types: thenormal wire wound side by side, the wire mounted in nets made on thecylinders and finally the wire mounted side by side with self-locking inwhich the base of one coil covers or partially fits in the base of thepreceding coil.

However, these linings have various disadvantages: with the normal wirewound side by side, if one of the coils breaks, either upon mounting orunder the carding effort, the whole can unwind and seriously damage themachine and even hurt the persons around the machine; moreover, for fineheels (six tenths of a millimeter for example) this wire lacks stabilityfor lining.

With wires placed in nets, it is difficult to obtain a heel whichcorresponds exactly to the width of the grooves; also the play whichexists causes a laminating of said grooves and thus after two or threelinings it is necessary to make new nets which is very expensive.

With respect to the last type of wire of the so called self-lockingtype, each coil is fixed on a following coil but if during lining thewire breaks or if the last coil comes loose the whole can unwind andseverely harass the rest of the members.

Additionally in all these assemblies the heel is very massive whichconsiderably increases the weight and the inertia of the cylinders andrequires a considerable lining tension, this tension causing with timedeformations of the cylinders unless there is used a special very robustmaterial which is thus very expensive and difficult to transport.

To facilitate the winding of these massive linings, the builder mustobtain a relatively soft heel, but on the other hand he requires veryhard points which resist impacts and wear. Also there is always atransition zone between the hardened and the non-hardened part. Owing tothis fact, in particular for certain carding where there is interest inusing fine elongated teeth, the difficulty resides in obtaining a goodhardening up to the base of the teeth without burning the extremity ofthe point while obtaining a heel which is relatively soft.

3,528,137 Patented Sept. 15,, 1970 ice The present invention which hasfor its purpose to avoid all these drawbacks has for its object a rigidlining for cylinders or drums and caps for cards.

It is characterized in that it is constituted essentially from ajudiciously profiled sheet of metal so as to have on the one hand ablade in which are cut teeth and on the other hand a height flexibleheel, this heel being able not only to fit laterally inside but to bepinched or snap-fittingly engaged by the inner part of the heel of thecontiguous coil, each coil being accordingly fast on the preceding andfollowing coil.

The invention will be better understood with the aid of the followingdescription made by way of non limiting example with respect to theaccompanying drawing which shows (on a scale of about one to fifty):

FIG. 1 two coils seen in cross section;

FIG. 2 a lining for mounting with non jointed coils with the aid ofcross pieces.

This lining is constituted of a sheet of metal 1 shaped in such a way asto have in addition to a blade 2 in which are cut teeth a heightflexible heel. The lateral entrance 3 is curved and has a dimension suchas to receive therein with snap-fit or pinching the male part 4, whichhas a different curvature than the lateral entrance 3, of the heel ofthe next coil.

An edge 5 wedges in a narrowed section 6 outside the heel.

Nicks can be made in the heel to facilitate winding along a smallradius.

In addition to low weights, this embodiment makes possible a completehardening (teeth and heel), the use of alloyed steels which aredifficult to laminate and the possibility of pinching the teeth afterhardening owing to the thinness of the blade (about two tenths of amillimeter).

In a modification, the coils are connected by a cross piece or spacingelements 7 having at its entrance a housing able to fit with pinching ora snap-fit on the outside 1f heel 4; and, at the opposite end, a malesection 9 which pinches itself within the heel of the following coil.This cross piece can be made of a profiled sheet or of a laminated wireor one obtained by extrusion.

It is evident that the invention is not limited to the example abovedescribed and shown from which there can be provided other shapes andother embodiments without thereby departing from the scope of thepresent invention.

What is claimed is:

1. A lining for carding rollers comprising: a plurality of coils, eachhaving a toothed portion and a resilient heel portion; said toothedportions extending away from said resilient heel portion and having aplurality of teeth thereon; each said resilient heel portion includinginner and outer holding means said inner holding means for receivingtherein and holding thereto with a snap-fit the outer holding means ofan alike and similarly orientated adjacent coil.

2. A lining according to claim 1; wherein said resilient heel portionhas a curved cross-section; and wherein said toothed portion and saidresilient heel portion are integral with each other.

3. A lining according to claim 1; wherein said resilient heel portioncomprises a first curved surface and a second curved surface, saidsecond curved surface having a different curvature than said firstcurved surface; and wherein said holding means includes said firstcurved surface and said outer holding means includes said second curvedsurface.

4. A lining for carding rollers comprising: a plurality of coils, eachhaving a toothed portion and a resilient heel portion; said toothedportions extending away from said resilient heel portions and having aplurality of teeth thereon; each said resilient heel portion havingfirst means insertable into a snap-fit engagement with an alike andsimilarly orientated coil, and having receiving means for holdingthereto with a snap-fit said first means of another alike and similarlyorientated coil.

5. A lining according to claim 4; wherein said resilient heel portionhas a curved cross-section; and wherein said toothed portion and saidresilient heel portion are integral with each other.

*6. A lining according to claim 4; wherein said resilient heel portioncomprises a first curved surface and a second curved surface, having asmaller radius of curvature than said first curved surface; and whereinsaid first curved surface is shaped to receive therein the matingportion of said another alike and similarly orientated coil and saidsecond curved surface is shaped to fit into the mating portion of saidalike and similarly orientated coil.

7. A lining assembly for carding rollers comprising; a plurality ofalike and similarly orientated separate coils each having a toothedportion and a resilient heel portion; each said toothed portionextending away from said resilient heel portion and having a pluralityof teeth thereon; a plurality of spacing elements each having a maleportion and a female portion and each positioned between two of saidcoils; each of said resilient heel portions including an inner holdingmeans for receiving therein and holding thereto with a snap-fit the maleportion of one of said spacing elements, and outer holding means forinsertion into and in snap-fit engagement therewith the female portionof a different one of said spacing elements; whereby said liningassembly is held together by a plurality of snap-fits.

8. A lining assembly according to claim 7; wherein each of saidresilient heel portions has a curved section which includes said innerand outer holding means; and wherein each of said female portionscomprises a first curved section and each of said male portionscomprises a second curved section, said first curved section having adifferent curvature than said second curved section.

References Cited FOREIGN PATENTS 720,210 12/1931 France. 854,090 11/1960Great Britain.

DORSEY NEWTON, Primary Examiner

